Comment by supriyo-biswas
18 hours ago
My reading of that statement is their test, assuming they had one, looked something like this:
rrs = resolver.resolve('www.example.test')
assert Record("cname1.example.test", type="CNAME") in rrs
assert Record("192.168.0.1", type="A") in rrs
Which wouldn't have caught the ordering problem.
It's implied that they intentionally tested it that way, without any assertions on the order. Not by oversight of incompetence, but because they didn't want to bake the requirement in due to uncertainty.
That approach only makes sense if tests are immutable though. If you are unsure if the order matters you should still test for it so you get a reminder to re-check your assumptions when the order changes.